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<H1>IBM Visualization Data Explorer Programmer&#39;s Reference</H1>
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<H3><A NAME="HDRDXNSN" HREF="progu097.htm#PToC_354">DXNewScreen</A></H3>
<A NAME="IDX1935"></A>
<A NAME="IDX1936"></A>
<P><STRONG>Function</STRONG>
<P>
Creates a new Object
aligned to the final screen.
<P><STRONG>Syntax</STRONG>
<BR>
<TT><STRONG><BR>
&#35;include &lt;dx/dx.h&gt;<BR>
<P><BR>
Screen DXNewScreen(Object o, int position, int z)<BR>
</STRONG></TT><BR>
<P><STRONG>Functional Details</STRONG>
<P>
A Screen Object is an Object that maintains a size and alignment with
the screen (output image) independent of the camera view and
scaling transformations applied to it.
<P>
The
<TT><STRONG>
position
</STRONG></TT>
parameter specifies one of the three options for
positioning of the Screen Object as explained in the following material;
it must be one of
<TT><STRONG>SCREEN_WORLD</STRONG></TT>,
<TT><STRONG>
SCREEN_PIXEL
</STRONG></TT>
or
<TT><STRONG>SCREEN_VIEWPORT</STRONG></TT>.  The
<TT><STRONG>
z
</STRONG></TT>
parameter determines the relative depth of the Object, as described
in the following text.
<P>
Three options are provided for the interpretation of translations
applied to a Screen Object.  First, a translation applied to the
Screen Object may specify a new position for the origin of the Screen
Object in world space (<TT><STRONG>SCREEN_WORLD</STRONG></TT>).  Second,
a translation applied to the Screen
Object may specify a new location for the Screen Object in the image,
measured in pixels, where (0,0) refers to the lower-left corner of the
image (<TT><STRONG>SCREEN_PIXEL</STRONG></TT>).  Third,
a translation applied to the Screen Object may specify
a new location for the Screen Object in the image, measured in
viewport-relative coordinates, where (0,0) refers to the lower-left
corner of the image and (1,1) refers to the upper-right corner of the
image (<TT><STRONG>SCREEN_VIEWPORT</STRONG></TT>).
<P>
The
<TT><STRONG>
z
</STRONG></TT>
parameter controls where the Screen Object is displayed relative to
all other Objects in the scene.
<I>-1</I> displays behind,
0 is in the scene, and
<I>+1</I> is in front of all other Objects.
<P>
The Object created can be deleted with DXDelete.
See <A HREF="progu023.htm#HDRMEMNG">4.2 , "Memory Management"</A>.
<P><STRONG>Return Value</STRONG>
<P>
Returns the Screen Object or returns <TT><STRONG>NULL</STRONG></TT> and
sets an error code.
<P><STRONG>See Also</STRONG>
<P>
<TT><STRONG>
<A HREF="progu200.htm#HDRDXGSI">DXGetScreenInfo</A>,
<A HREF="progu325.htm#HDRDXSSO">DXSetScreenObject</A>
</STRONG></TT>
<P>
<A HREF="progu079.htm#HDRSNCS">16.5 , "Screen Class"</A>.
<P><P>
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